/** 
 * @file llnotificationalerthandler.cpp
 * @brief Notification Handler Class for Alert Notifications
 *
 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */


#include "llviewerprecompiledheaders.h" // must be first include

#include "llnotificationhandler.h"

#include "llagentcamera.h"
#include "llnotifications.h"
#include "llprogressview.h"
#include "lltoastnotifypanel.h"
#include "llviewercontrol.h"
#include "llviewerwindow.h"

#include "lltoastalertpanel.h"

using namespace LLNotificationsUI;

//--------------------------------------------------------------------------
LLAlertHandler::LLAlertHandler(const std::string& name, const std::string& notification_type, bool is_modal) 
:	LLSystemNotificationHandler(name, notification_type),
	mIsModal(is_modal)
{
	LLScreenChannelBase::Params p;
	p.id = LLUUID(gSavedSettings.getString("AlertChannelUUID"));
	p.display_toasts_always = true;
	p.toast_align = NA_CENTRE;
	p.channel_align = CA_CENTRE;

	// Getting a Channel for our notifications
	mChannel = LLChannelManager::getInstance()->getChannel(p)->getHandle();
	mChannel.get()->setCanStoreToasts(false);
}

//--------------------------------------------------------------------------
LLAlertHandler::~LLAlertHandler()
{
}

//--------------------------------------------------------------------------
void LLAlertHandler::initChannel()
{
	S32 channel_right_bound = gViewerWindow->getWorldViewRectScaled().getWidth() / 2;
	mChannel.get()->init(channel_right_bound, channel_right_bound);
}

//--------------------------------------------------------------------------
bool LLAlertHandler::processNotification(const LLNotificationPtr& notification)
{
	if(mChannel.isDead())
	{
		return false;
	}

	// arrange a channel on a screen
	if(!mChannel.get()->getVisible())
	{
		initChannel();
	}

	if (notification->canLogToIM() && notification->hasFormElements())
	{
		const std::string name = LLHandlerUtil::getSubstitutionName(notification);

		LLUUID from_id = notification->getPayload()["from_id"];

		// firstly create session...
		LLHandlerUtil::spawnIMSession(name, from_id);

		// ...then log message to have IM Well notified about new message
		LLHandlerUtil::logToIMP2P(notification);
	}

	LLToastAlertPanel* alert_dialog = new LLToastAlertPanel(notification, mIsModal);
	LLToast::Params p;
	p.notif_id = notification->getID();
	p.notification = notification;
	p.panel = dynamic_cast<LLToastPanel*>(alert_dialog);
	p.enable_hide_btn = false;
	p.can_fade = false;
	p.is_modal = mIsModal;
	p.on_delete_toast = boost::bind(&LLAlertHandler::onDeleteToast, this, _1);

	// Show alert in middle of progress view (during teleport) (EXT-1093)
	LLProgressView* progress = gViewerWindow->getProgressView();
	LLRect rc = progress && progress->getVisible() ? progress->getRect() : gViewerWindow->getWorldViewRectScaled();
	mChannel.get()->updatePositionAndSize(rc);

	LLScreenChannel* channel = dynamic_cast<LLScreenChannel*>(mChannel.get());
	if(channel)
		channel->addToast(p);
	
	return false;
}

void LLAlertHandler::onChange( LLNotificationPtr notification )
{
	LLToastAlertPanel* alert_dialog = new LLToastAlertPanel(notification, mIsModal);
	LLScreenChannel* channel = dynamic_cast<LLScreenChannel*>(mChannel.get());
	if(channel)
		channel->modifyToastByNotificationID(notification->getID(), (LLToastPanel*)alert_dialog);
}

//--------------------------------------------------------------------------
LLViewerAlertHandler::LLViewerAlertHandler(const std::string& name, const std::string& notification_type)
	: LLSystemNotificationHandler(name, notification_type)
{
}

bool LLViewerAlertHandler::processNotification(const LLNotificationPtr& p)
{
	if (gHeadlessClient)
	{
		LL_INFOS("LLViewerAlertHandler") << "Alert: " << p->getName() << LL_ENDL;
	}

	// If we're in mouselook, the mouse is hidden and so the user can't click 
	// the dialog buttons.  In that case, change to First Person instead.
	if( gAgentCamera.cameraMouselook() )
	{
		gAgentCamera.changeCameraToDefault();
	}

	return false;
}


